Honing Stone VINTAGE USSR Rare Abrasive Whetstone microcorundum sharpening stone $29.99 Country USSR Country/Region of Manufacture Unknown Tang Full Brand MZShO Color Brown Type Stone Original/Reproduction Original condition Used This is Vintage Rare Honing stone. Made on "Moscow Factory of Grinding Tools" in USSR in 1956. 12.5 cm*3.5 cm*1.0 cm, original Coffin.Perfect smooth surface.As is.